根据所给汉语完成下面句子，每空词数不限。

迈克敲了敲门，但没有回应。

Mike ________ the door, but there was no answer．

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

My sister ________(be)a singer since she left the school．

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

We've worked for a long time．Let's stop ________(drink)some water．

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

I ________(not go)to bed until my mother came back at ten last night．

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

Have you read ________(today)newspaper?

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

A computer is ________(expensive)than a TV set．

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

－How many ________(tooth)does a dog have?

－Sorry, I have no idea．Let's search on the Internet．

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

We should speak to the old man ________(polite)．

根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

Playing too many computer games is ________(harm)to you．

语法填空，阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填在1－10的相应位置上。

　　In order to know a foreign language thoroughly, four things are necessary．Firstly, we must understand the language when we hear 　　1　　 spoken．Secondly, we must be able to speak it ourselves correctly with confidence and without hesitation．　　2　　, we must be able to read the language, and fourthly, we must be able to write it．We must be able to make sentences that are grammatically correct．

　　There is no easy way to success 　　3　　 language learning．　　4　　 good memory is a great help, but it is not enough only 　　5　　(memorize)rules from a grammar book．It is not much use learning by heart long lists of words and 　　6　　 meanings, studying the dictionary and so on．We must learn by using the language．　　7　　 we are satisfied with only a few rules we have memorized, we are not really learning the language．“Learn through use”is a good piece of 　　8　　(advise)for those 　　9　　 are studying a new language．Practice is important．We must practise speaking and 　　10　　(write)the language whenever we can．